Hi Andre,
On 5 September 2018 at 15:37, André Luiz Molan wrote: | Hi, | | I'm trying to create an R package using Rcpp. I am using the "Build" option | from RStudio and roxygen2 package. My package is build with no error | messages and normally loaded. However, when I call a function from the new | package, I have the following message: | | *Error in .Call(<pointer: (nil)>, x) : | NULL value passed as symbol address | Called from: MakeSquare(x = val)* | | | This is just a simple function I have created for testing: | | | cppFunction('double MakeSquare(double x){ | double result = 0; | result = x*x; | return result; | | }') cppFunction() (as well as sourceCpp)) are not meant for packages. So create a package: - Use File -> New Project -> New Directory -> R Package using Rcpp (this option differs across RStudio versions). - Alternatively use Rcpp.package.skeleton() (which has a help page as usual). Add your functions to that package, edit and adjust as needed. That should work, including with roxygen2. Dirk | | | The Rcpp function I have created above is called by another function: | | CalcSquare <- function(val1,val2){ | valResult <- (val1 + val2)/2 | valSquare <- MakeSquare(x = valResult) | return(valSquare) | } | | | I have imported all the necessary packages, including Rcpp. I have looked | at different discussion forums by I did not find any solution. | | I sincerely hope you could help me. | | Best regards, | | André | _______________________________________________ | Rcpp-devel mailing list | Rcpp-devel@lists.r-forge.r-project.org | https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel -- http://dirk.eddelbuettel.com | @eddelbuettel | e...@debian.org _______________________________________________ Rcpp-devel mailing list Rcpp-devel@lists.r-forge.r-project.org https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/rcpp-devel